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Toshiyuki Yokoi; Peng Wu; Takashi Tatsumi. (2003). Para-selectivity enhancement by coexistent molecules in phenol hydroxylation over TS-1/H2O2 system. , 4(1), 11–15. doi:10.1016/s1566-7367(02)00228-5 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research